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Subjectdrivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm_plane.c:83:31: warning: no previous prototype for 'amd_get_format_info'
Hi Rodrigo,

FYI, the error/warning still remains.

tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: c040862bfbd9c5f3cb64e1df1c623e20e38fe656
commit: 5d945cbcd4b16a29d6470a80dfb19738f9a4319f drm/amd/display: Create a file dedicated to planes
date: 2 weeks ago
config: alpha-randconfig-r025-20220804 (https://download.01.org/0day-ci/archive/20220805/202208050756.BbOxHxYk-lkp@intel.com/config)
compiler: alpha-linux-gcc (GCC) 12.1.0
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=5d945cbcd4b16a29d6470a80dfb19738f9a4319f
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout 5d945cbcd4b16a29d6470a80dfb19738f9a4319f
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=alpha SHELL=/bin/bash drivers/gpu/drm/amd/amdgpu/ drivers/gpu/drm/amd/display/amdgpu_dm/

If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

>> drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm_plane.c:83:31: warning: no previous prototype for 'amd_get_format_info' [-Wmissing-prototypes]
83 | const struct drm_format_info *amd_get_format_info(const struct drm_mode_fb_cmd2 *cmd)
| ^~~~~~~~~~~~~~~~~~~
>> drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm_plane.c:88:6: warning: no previous prototype for 'fill_blending_from_plane_state' [-Wmissing-prototypes]
88 | void fill_blending_from_plane_state(const struct drm_plane_state *plane_state,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm_plane.c:152:6: warning: no previous prototype for 'modifier_has_dcc' [-Wmissing-prototypes]
152 | bool modifier_has_dcc(uint64_t modifier)
| ^~~~~~~~~~~~~~~~
>> drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm_plane.c:157:10: warning: no previous prototype for 'modifier_gfx9_swizzle_mode' [-Wmissing-prototypes]
157 | unsigned modifier_gfx9_swizzle_mode(uint64_t modifier)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~
>> drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm_plane.c:752:5: warning: no previous prototype for 'fill_plane_buffer_attributes' [-Wmissing-prototypes]
752 | int fill_plane_buffer_attributes(struct amdgpu_device *adev,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm_plane.c:992:5: warning: no previous prototype for 'dm_plane_helper_check_state' [-Wmissing-prototypes]
992 | int dm_plane_helper_check_state(struct drm_plane_state *state,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~
>> drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm_plane.c:1046:5: warning: no previous prototype for 'fill_dc_scaling_info' [-Wmissing-prototypes]
1046 | int fill_dc_scaling_info(struct amdgpu_device *adev,
| ^~~~~~~~~~~~~~~~~~~~
>> drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm_plane.c:1222:6: warning: no previous prototype for 'handle_cursor_update' [-Wmissing-prototypes]
1222 | void handle_cursor_update(struct drm_plane *plane,
| ^~~~~~~~~~~~~~~~~~~~
>> drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm_plane.c:1575:5: warning: no previous prototype for 'amdgpu_dm_plane_init' [-Wmissing-prototypes]
1575 | int amdgpu_dm_plane_init(struct amdgpu_display_manager *dm,
| ^~~~~~~~~~~~~~~~~~~~
In file included from drivers/gpu/drm/amd/amdgpu/../display/dc/inc/core_types.h:32,
from drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm_trace.h:41,
from drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm_plane.c:36:
drivers/gpu/drm/amd/amdgpu/../display/include/ddc_service_types.h:137:22: warning: 'SYNAPTICS_DEVICE_ID' defined but not used [-Wunused-const-variable=]
137 | static const uint8_t SYNAPTICS_DEVICE_ID[] = "SYNA";
| ^~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../display/include/ddc_service_types.h:134:17: warning: 'DP_SINK_BRANCH_DEV_NAME_7580' defined but not used [-Wunused-const-variable=]
134 | static const u8 DP_SINK_BRANCH_DEV_NAME_7580[] = "7580\x80u";
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../display/include/ddc_service_types.h:132:22: warning: 'DP_SINK_DEVICE_STR_ID_2' defined but not used [-Wunused-const-variable=]
132 | static const uint8_t DP_SINK_DEVICE_STR_ID_2[] = {7, 1, 8, 7, 5, 0};
| ^~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../display/include/ddc_service_types.h:131:22: warning: 'DP_SINK_DEVICE_STR_ID_1' defined but not used [-Wunused-const-variable=]
131 | static const uint8_t DP_SINK_DEVICE_STR_ID_1[] = {7, 1, 8, 7, 3, 0};
| ^~~~~~~~~~~~~~~~~~~~~~~


vim +/amd_get_format_info +83 drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm_plane.c

82
> 83 const struct drm_format_info *amd_get_format_info(const struct drm_mode_fb_cmd2 *cmd)
84 {
85 return amdgpu_lookup_format_info(cmd->pixel_format, cmd->modifier[0]);
86 }
87
> 88 void fill_blending_from_plane_state(const struct drm_plane_state *plane_state,
89 bool *per_pixel_alpha, bool *pre_multiplied_alpha,
90 bool *global_alpha, int *global_alpha_value)
91 {
92 *per_pixel_alpha = false;
93 *pre_multiplied_alpha = true;
94 *global_alpha = false;
95 *global_alpha_value = 0xff;
96
97 if (plane_state->plane->type != DRM_PLANE_TYPE_OVERLAY)
98 return;
99
100 if (plane_state->pixel_blend_mode == DRM_MODE_BLEND_PREMULTI ||
101 plane_state->pixel_blend_mode == DRM_MODE_BLEND_COVERAGE) {
102 static const uint32_t alpha_formats[] = {
103 DRM_FORMAT_ARGB8888,
104 DRM_FORMAT_RGBA8888,
105 DRM_FORMAT_ABGR8888,
106 };
107 uint32_t format = plane_state->fb->format->format;
108 unsigned int i;
109
110 for (i = 0; i < ARRAY_SIZE(alpha_formats); ++i) {
111 if (format == alpha_formats[i]) {
112 *per_pixel_alpha = true;
113 break;
114 }
115 }
116
117 if (*per_pixel_alpha && plane_state->pixel_blend_mode == DRM_MODE_BLEND_COVERAGE)
118 *pre_multiplied_alpha = false;
119 }
120
121 if (plane_state->alpha < 0xffff) {
122 *global_alpha = true;
123 *global_alpha_value = plane_state->alpha >> 8;
124 }
125 }
126
127 static void add_modifier(uint64_t **mods, uint64_t *size, uint64_t *cap, uint64_t mod)
128 {
129 if (!*mods)
130 return;
131
132 if (*cap - *size < 1) {
133 uint64_t new_cap = *cap * 2;
134 uint64_t *new_mods = kmalloc(new_cap * sizeof(uint64_t), GFP_KERNEL);
135
136 if (!new_mods) {
137 kfree(*mods);
138 *mods = NULL;
139 return;
140 }
141
142 memcpy(new_mods, *mods, sizeof(uint64_t) * *size);
143 kfree(*mods);
144 *mods = new_mods;
145 *cap = new_cap;
146 }
147
148 (*mods)[*size] = mod;
149 *size += 1;
150 }
151
> 152 bool modifier_has_dcc(uint64_t modifier)
153 {
154 return IS_AMD_FMT_MOD(modifier) && AMD_FMT_MOD_GET(DCC, modifier);
155 }
156
> 157 unsigned modifier_gfx9_swizzle_mode(uint64_t modifier)
158 {
159 if (modifier == DRM_FORMAT_MOD_LINEAR)
160 return 0;
161
162 return AMD_FMT_MOD_GET(TILE, modifier);
163 }
164

--
0-DAY CI Kernel Test Service
https://01.org/lkp

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